We have several cracks in our patio. To each side of them these colors exist like pieces of a puzzle. SH pre and post treat does not remove them, neither does spot work. Is it because they fill up with rain water over time, overflow and cause this? The reason I want to know is so if I do a customers patio with cracks, i can let them know informed information and expectations up front. Its like this hear in all these long root cracks no matter how big or small.
Concrete is cheap. Don’t live with those cracks. Bust it up and replace. Don’t clean other concrete like that. It will just encourage them to not fix it ')
Looks like they had some crack repair caulk type stuff on there that came off.
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You can’t wash off “old”
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